Original research · August 31, 2026
Courtside Odds Compared, and the $100 Signup Offer
By Matt Downs
Courtside is a sweepstakes book, which means it plays differently from a regular sportsbook and is available in more than 40 states. The interesting thing about it right now has nothing to do with how it is structured. It is that its prices keep landing at the top of the row.
That is a claim you can check rather than take on faith, so this page shows one row, names the number, and works out what the gap between books is actually worth.
One row, thirteen books, a 45 cent spread
The row above is the total on Denver at Kansas City, scheduled for 14 September. The bet is the over on 42.5. Every book on the screen is quoting the same side of the same number on the same game.
Courtside posts -108 and is flagged as the best available price. The next best is -110. Most of the field clusters at -125, and the widest quote on the row is -153. That is a 45 cent spread on an identical bet.
The screen also carries a devigged consensus probability, which is the market's blended read on how often the over actually lands once the vig is stripped out of every book's quote. On this row it reads 52.5%.
What a 45 cent spread is actually worth
A price is a break-even percentage wearing a disguise. Convert each quote and the row stops being a list of numbers and becomes a list of thresholds.
At -108 you need to win 51.9% of the time to break even. At -125 you need 55.6%. At -153 you need 60.5%. Against a market read of 52.5%, the same bet is a small winner at one book, a coin flip at the next, and a clear loser at most of the rest.
Running the edge on the best price: a 52.5% chance at -108 returns +1.11% per $100 staked, which is what the screen reports as +1.1%. Take the identical bet at -125 and it is -5.50%. At -153 it is -13.19%. Nothing changed except which app was open.
Break-even by price, on a market read of 52.5%
| -108 (Courtside, best on the row) | 51.9% needed · +1.11% edge | |
|---|---|---|
| -110 (next best) | 52.4% needed · +0.23% edge | |
| -113 | 53.1% needed · -1.04% | |
| -121 | 54.8% needed · -4.11% | |
| -125 (where most of the field sat) | 55.6% needed · -5.50% | |
| -153 (widest quote on the row) | 60.5% needed · -13.19% |
How to check this on any row, for free
None of the above requires trusting a review. The odds screen puts every book we cover on one row and marks the best price, so you can select Courtside and see for yourself whether it is at the top of a given market or buried in the middle of it. It is free and it covers game lines across every league in season.
If you would rather do the arithmetic by hand, the implied odds calculator turns any American price into the percentage it needs to win, and the no-vig calculator strips the margin out of a two-sided market to give you the fair number to compare against.
The method is the same every time. Find the break-even percentage the price demands, find the market's read on how often it lands, and take the bet only when the second number is larger than the first.
The signup offer: spend $10, get $100 in free play
Courtside runs a new-player offer through us: spend $10 and receive $100 in free play, using code UPSIDE. It replaced a smaller $50 version of the same offer.
Upside earns a commission if you sign up through our link, and it is worth stating that plainly rather than burying it. The commission is not the reason the price comparison above says what it says. Every number on this page came off a screen you can open yourself, and the arithmetic is reproducible in two free calculators.
No purchase necessary. Void where prohibited. Must be 18+ to play.
What this page does not claim
This is one row on one day. It does not establish that Courtside prices best across the board, and the honest expectation is that it will not: newer books tend to price sharply in some markets and poorly in others, and the advantage narrows as a market matures.
The 52.5% figure is a devigged consensus drawn from the books quoting that market, not a prediction and not a result. The bet in the example had not been played when this was written.
Prices move. The row above was captured on 31 August 2026 for a game two weeks out, so by the time you read this the numbers will differ. The method survives the movement; the specific quotes do not.
Frequently asked questions
What is the Courtside promo code?
The code is UPSIDE. New players who spend $10 receive $100 in free play. It replaced an earlier offer that paid $50.
Are Courtside's odds actually competitive?
On the row measured here, yes. Courtside posted -108 on an NFL total where the next best price was -110, most of the market sat at -125, and the widest quote was -153. That is one row on one day, and it is not evidence that Courtside prices best on every market.
How much does a better price actually matter?
It decides whether a bet wins or loses money. On a market read of 52.5%, the same over is worth +1.11% per $100 at -108 and -5.50% at -125. The bet did not change. Only the price did.
Is Courtside a sportsbook?
It is a sweepstakes book, so it operates under a different model from a traditional sportsbook and is available in over 40 states. For price-comparison purposes it appears on the odds screen alongside every other book we cover.